It does exist
You mean TB to ethernet adapter? Does it exist? Link please.
Hackintoshes are not replacements for Mac Pros. Or Xserves. Or any other "pro" computer from Apple used by true professionals in the exercise of their profession.
Are they "viable" solutions for cheapskates who really don't need the power of a Mac Pro because they're just hobbyists with a spec fetish ? Sure, why not.
Nonsense. Just because you are scared to try it doesn't change the fact that it's a great option for professional work.
Honestly in many ways they're a better solution than the mac pro, the wider selection of hardware means you can get things like USB3 and more ram slots. I built one about 2.5 years ago that still has a better ram capacity than the base MP shipping right now, plus it's much faster for about half the price. Building one now would have an even greater price/performance advantage. And once I had it built and the software installed, the maintenance has been no more than any of my "real" macs.
CPU benchmarks mean nothing when you need IO and memory capacity.
My post was just a response to someone claiming laptops couldn't be used for "pro" work because the CPU isn't good enough.